[LU-2855] error management in KUC broadcast delivery

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.4.0
• Labels: HB patch
• Severity: 3
• Assignee: Keith Mannthey (Inactive)
• Reporter: CEA

Description

in KUC broadcast groups, the message delivery fails if a userland process terminates without closing its kuc channel properly.
This patch improves the behavior of KUC broadcast groups, to make it more adapted for HSM usage:
the message delivery is successful if at least 1 userland process is present in this group and receives the message successfully.
Only HSM copytools use KUC broadcast groups (no impact on changelog processing).